Apparatus and method of determining a status using RFID tag devices

ABSTRACT

Methods and apparatuses are provided using RFID devices to assist in determining an open status of a container. For example, a first RFID tag is fixed to a first portion of the container and a second RFID tag is fixed to a second portion of the container. Upon a user action to at least partially open the container, the first and second portions will move relative to each other, such that one or more of the RFID tags will no longer be readable by the RFID-tag reader or will now be readable by the reader. The reading or cessation of reading of one or more RFID tags indicates at least one open status of the container. In some embodiments, the open status is at least one of an unsealing confirmation, an open motion initiation status, an open motion confirmation, a partial open status and a fully open status.

RELATED APPLICATION(S)

This application is a continuation of U.S. application Ser. No.15/300,915, filed Sep. 30, 2016, which is a 35 U.S.C. 371 national stageapplication of International Application No. PCT/2015/024024 filed Apr.2, 2015, which claims the benefit of U.S. Provisional Application No.61/974,381, filed Apr. 2, 2014, all of which are incorporated byreference in their entirety herein.

TECHNICAL FIELD

This invention relates generally to radio-frequency identification(RFID) transceivers.

BACKGROUND

RFID tags are known in the art. These so-called tags often assume theform factor of a label or a literal “tag” but are also sometimesintegrated with a host article and/or its packaging. RFID tags typicallycomprise an integrated circuit and one or more antennas. The integratedcircuit typically carries out a variety of functions includingmodulating and demodulating radio frequency signals, data storage, anddata processing. Some integrated circuits are active or self-powered (inwhole or in part) while others are passive, being completely dependentupon an external power source (such as an RFID tag reader) to supporttheir occasional functionality.

There are proposals to utilize RFID tags to individually identifyindividual items. The Electronic Product Code (EPC) as managed byEPCGlobal, Inc. represents one such effort in these regards. EPC-basedRFID tags each have a unique serial number to thereby uniquely identifyeach tag and, by association, each item correlated on a one-for-onebasis with such tags. (The corresponding document entitled EPCRadio-Frequency Identity Protocols Class-1 Generation-2 UHF RFIDProtocol for Communications at 860 MHz-960 MHz Version 1.0.9 is herebyfully incorporated herein by this reference.)

RFID readers are devices that attempt to read any RFID tags within rangeof the reader. Typically, the RFID reader transmits electromagneticenergy through free space to any tags within range. The energy isreceived at any RFID tag in range, modulated with identification orother data stored in the RFID tag, and backscattered by the RFID tagback the reader. The RFID reader receives the backscattered energy anddemodulates the energy to recover the data. In other forms, the RFIDreader induces a response within the RFID tag using electromagneticforce, the induced response is then modulated with the data of the RFIDtag which then induces a corresponding response back in the RFID readerwhich demodulates the response to recover the data. The data recoveredby the RFID reader is then processed in accordance with the purpose ofthe reading.

BRIEF DESCRIPTION OF THE DRAWINGS

Disclosed herein are embodiments of apparatuses and methods pertainingto the use of RFID tags and readers to automatically make certaindeterminations, e.g., to determine an open status of a sealed container.This description includes drawings, wherein:

FIG. 1 is a block diagram in accordance with several embodiments.

FIG. 2 is a block diagram in accordance with several embodiments.

FIGS. 3A-3D are diagrams illustrating an application in accordance withseveral embodiments.

FIGS. 4A-4B are diagrams illustrating an application in accordance withseveral embodiments.

FIG. 4C is an illustration of a near field RFID device in accordancewith several embodiments.

FIG. 5 is a diagram illustrating application in accordance with severalembodiments.

FIG. 6 is a diagram of a multi-tag RFID device in accordance withseveral embodiments.

FIG. 7 is a diagram illustrating an application using a multi-tag RFIDdevice in accordance with several embodiments.

FIG. 8 is a flow diagram of a method in accordance with severalembodiments.

FIGS. 9A-9C are illustrations of a container in accordance with severalembodiments.

FIGS. 10A-10C are illustrations of another container in accordance withseveral embodiments.

FIG. 11 is a variation of the container of FIGS. 10A-10C in accordancewith several embodiments.

FIG. 12 is an illustration of a near field and a far field of RFIDcommunication in accordance with some embodiments.

FIGS. 13A-13B are diagrams illustrating the coupling and decoupling ofnear field and far field components in accordance with some embodiments.

Elements in the figures are illustrated for simplicity and clarity andhave not necessarily been drawn to scale. For example, the dimensionsand/or relative positioning of some of the elements in the figures maybe exaggerated relative to other elements to help to improveunderstanding of various embodiments of the present invention. Also,common but well-understood elements that are useful or necessary in acommercially feasible embodiment are often not depicted in order tofacilitate a less obstructed view of these various embodiments of thepresent invention. Certain actions and/or steps may be described ordepicted in a particular order of occurrence while those skilled in theart will understand that such specificity with respect to sequence isnot actually required. The terms and expressions used herein have theordinary technical meaning as is accorded to such terms and expressionsby persons skilled in the technical field as set forth above exceptwhere different specific meanings have otherwise been set forth herein.

DETAILED DESCRIPTION

Generally speaking, pursuant to various embodiments, a container is in aclosed orientation and upon a given user action, the container can bemoved to an at least a partially open orientation. Accordingly, in someembodiments, it is desired to automatically determine an open status ofthe container. In some embodiments, an RFID-tag reader and RFID tagslocated at or proximate to the container are used to indicate an openstatus of the container. In some embodiments, a first RFID tag is fixedto a first portion of the container and a second RFID tag is fixed to asecond portion of the container. Upon a user action to at leastpartially open the container, the first and the second portions will becaused to move relative to each other, resulting in that one or more ofthe RFID tags will no longer be readable by the RFID-tag reader or willnow be readable by the RFID-tag reader. The reading or cessation ofreading of one or more RFID tags indicates at least one open status ofthe container. In some embodiments, the container is closed and in someembodiments, the container is closed and sealed. In some embodiments,the open status is at least one of a fully closed/sealed status, anunsealing confirmation, an open motion initiation status, an open motionconfirmation, a partial open status and a fully open status. In someembodiments, the container may take the form of a container lockedwithin a delivered-package vault such as described in U.S. patentapplication Ser. No. 14/052,102 filed Oct. 11, 2013 and entitled SECUREDELIVERY RECEPTACLE, which is incorporated herein by reference, wherethe container contains a package for delivery to a recipient, and whereit is desired to automatically detect the open status of the containerto determine delivery status/completion, for example. In someembodiments, the first portion and the second portion of the containerare components that are fixed to the container. In a non-limitingexample, the first and second portions components including are a sleeveand an insert coupled to portions of the container.

In some embodiments, one of more of the RFID tags incorporate principlesembodied in RFID tags such as those described in U.S. patent applicationSer. No. 12/721,527 filed Mar. 10, 2010, now U.S. Pat. No. 8,286,884issued Oct. 16, 2012; U.S. patent application Ser. No. 13/653,324 filedOct. 16, 2012, now U.S. Pat. No. 8,544,758 issued Oct. 1, 2013; U.S.patent application Ser. No. 13/828,821 filed Mar. 14, 2013; U.S. patentapplication Ser. No. 12/884,097 filed Sep. 16, 2010, now U.S. Pat. No.8,286,887 issued Oct. 16, 2012; and U.S. patent application Ser. No.13/653,331 filed Oct. 16, 2012, now U.S. Pat. No. 8,505,829 issued Aug.13, 2013, all of which are incorporated herein by reference. Such RFIDtags are designed such that the near field portion and the far fieldportion of the RFID tag may be coupled together and decoupled. Whencoupled, the RFID tag is readable by an RFID tag reader in both the nearfield of RFID communication and in the far field of RFID communication.When decoupled, the RFID tag is only readable by an RFID tag reader inthe near field of RFID communication. In some cases, the near fieldportion of the RFID tag may be a pre-manufactured generic componentwhich is cooperated with a far field antenna separately designed andmanufactured for the application.

In some embodiments, a multi-tag RFID device is provided that includesfirst and second near field RFID tags implemented on a substrate andthat are each coupled to and share a conductive element on thesubstrate. The conductive element functions as a far field antenna toboth the first and second near field only RFID tags. In someembodiments, the RFID device is implemented in a single inlay. Such RFIDdevices may be used in some embodiments to indicate an open status of acontainer and/or may be used for other purposes.

As is well known in the art, referring initially to FIG. 12, embodimentsof the near field and the far field of RFID communication are explainedand illustrated. For example, the near field is the region about thereader antenna where the reader antenna and the tag are coupled withinone full wavelength of the carrier wave; however, in many practicalapplications, the near field is within one half wavelength of thecarrier wave. The far field 1202 is the region beyond the near fieldregion, i.e., coupled beyond one full wavelength of the carrier wave. Inthe far field, electric and magnetic fields propagate outward as anelectromagnetic wave and are perpendicular to each other and thedirection of propagation. The angular field distribution does not dependon the distance from the antenna. These electric and magnetic fields arerelated to each other via free-space impedance. Thus, in the far fieldregion, the electromagnetic signal propagates as waveform.

In the near field region, the electromagnetic signal does not propagateas a waveform. The near field region has two sub-regions: a near fieldradiating sub-region 1204 and a near field reactive sub-region 1206. Inthe near field reactive sub-region 1206, energy is stored, but notradiated. The near field reactive sub-region 1206 is typically where thereader antenna and the tag are coupled within ½ wavelength of thecarrier wave. This is typically very close to the reader antenna. Thenear field radiating sub-region 1204 is a transitional region betweenthe near field reactive sub-region 1206 and the far field region 1202.The near field radiating sub-region 1204 is typically where the readerantenna and the tag are coupled between ½ to 1 full wavelength of thecarrier wave. In the near field radiating sub-region 1204, while thereis radiated electric and magnetic fields, these electric and magneticfields do not propagate and are not perpendicular to each other and tothe direction of propagation (if there were propagation). This is wellunderstood in the art.

In many embodiments, the boundary between the near field region and thefar field region can be defined as “r”, illustrated in FIG. 12. In someembodiments, this boundary is a function of the antenna characteristics(e.g., the antenna's electrical size) and the wavelengths used, as wellas whether the reader is a point source or array. In some embodiments,with antennas whose size is comparable to wavelength (such as commonlyused in UHF RFID applications), the approximate boundary (r) between thefar field and the near field regions may be expressed as r=2D²/λ where Dis the maximum antenna dimension and λ is the wavelength. Forelectrically small antennas (e.g., as used in LF/HF RFID applications),the near field radiating sub-region is small and the boundary r betweennear and far fields may be expressed as r=λ/2π. These relationships arewell known in the art.

Generally, the near field and far fields of RFID communication are wellknown in the art. Many near field devices include devices complying withthe Near Field Communication (NFC) Forum standards, High Frequency (HF)devices, Electronic Shelf Labels (ESLs), and so on. Other examples ofdevices that communicate in the near field are near field only tags suchas those tags described in U.S. Pat. Nos. 8,286,884 and 8,286,887, bothof which are incorporated herein by reference, i.e., tags that lack afar field antenna and magnetically, inductively or capacitively coupleto a corresponding reader. Devices that communicate in the near fieldtypically have a range of being detected at about an inch or so away upto about 1-2 feet maximum depending on the frequencies used.

In a typical ultra-high frequency (UHF) RFID system where the carrierfrequency is in the range of 860-960 MHz, the effective near field isthe region up to approximately 1-15 centimeters from the reader antenna,whereas the far field is the region from approximately 15-40 centimetersand beyond the reader antenna. In many cases, the reader can read tagsin the near field up to about 15 centimeters away, whereas depending onthe tag antenna, the reader can read tags in the far field up to about20-30 feet or more away. These features are also well known in the art.

It is understood that the near field tags may be designed to operatewith reader antennas operating at a variety of frequencies, such as lowfrequency (LF) at 125-134 kHz, high frequency (HF) at 13.56 MHz, ultrahigh frequency (UHF) at 860-960 MHz, microwave frequencies at 2.4 and5.8 GHz, for example.

Another way to view near field and far field communications relates tohow the reader and the tag are coupled together. The reader and a nearfield tag communicate through magnetic, inductive or capacitive couplingbetween the reader antenna and the tag antenna (typically a near fieldloop antenna). For example, a current is induced in the reader antenna(e.g., loop antenna), which when brought into close range with the tagantenna (loop antenna) induces a current in the tag antenna which ismodulated according to the data of the tag and induced back to thereader antenna. This type of near field communication is well known inthe art and may be considered the near field reactive sub-region 1206 ofFIG. 12. Devices capable of communicating in the near field radiatingsub-region need more than a loop antenna. For example, at least someadditional conducting portion extending from the loop antenna (such asthe conductors 424 and 426 of FIG. 4C discussed below). Such conductorswill provide some radiation of the electric and magnetic fields but notprovide a propagation of a waveform. This type of near fieldcommunication is well known in the art and may be considered the nearfield radiating sub-region 1204 of FIG. 12.

With far field RFID devices, the reader and the tag communicate throughthe transmission of electromagnetic energy from the reader to the tagwhich is reflected back as transmitted electromagnetic energy to thereader. Far field communicating devices typically use dipole antennas orother antenna structures capable of transmitting energy and receivedtransmitted energy in the far field. In many cases, the far fieldradiation decays as described in the far field region 1202 of FIG. 12.This type of far field communication is well known in the art. Furtherinformation regarding the near field and far fields of RFID operationare described in NIKITIN ET AL., “An Overview of Near Field UHF RFID”,IEEE, February 2007, which is incorporated herein by reference.

It is noted that in some embodiments, the read range of a given readermay be limited or changed by reducing or adjusting the power level ofsignals transmitted by the RFID reader. For example, far field RFIDreaders at normal operating power levels may be able to read far fieldRFID tags up to 20-30 feet. For example, the transmit power of thereader could be adjusted such that the reader can only read RFID tags atless than the normal range, e.g., up to 10-20 feet. This allows for thereading of the tag to occur only when the tag and tag reader are broughtinto a closer proximity compared to when the reader reads at normalpower levels. Conversely, the increase of the read range results in thedetection of a less precise (farther) location relationship between thereader and the tag than when the RFID reader operates at normal power.

Referring now to FIG. 1, a system 100 is shown including an RFID reader102 (which may also be referred to as an RFID-tag reader or simply as areader) which is coupled to a control circuit 104 which is coupled to acentral system 106 and which is in turn coupled to one or more userdevices 108. As is well known in the art, the RFID reader 102 isconfigured to “read” any RFID tags (which may also be referred to asRFID transceivers), such as RFID tag 110 within the operating range ofboth the RFID reader 102 and the RFID tag 110. For example, asillustrated in FIG. 1, in a passive RFID communication system, the RFIDreader 102 includes a reader antenna and transmits a modulated radiofrequency (RF) signal 112 to the RFID tag 110 (and any other RFID tagwithin range). The tag antenna receives the RF signal and forms anelectric and magnetic field from which the RFID tag 110 draws power forthe integrated circuit of the RFID tag 110. The integrated circuit thencauses the RFID tag 110 to modulate a backscatter RF signal 114 back tothe RFID tag reader 102, the RF signal 114 containing informationencoded in the memory of the RFID tag 110, such as the ID of the RFIDtag 110. The functionality and operation of the reading of tags by theRFID reader 102 and the RFID tag 110 is well known in the art.

In several embodiments, the RFID tag 110 is located on or proximate to acontainer which is normally in a closed orientation and is designed tobe moved into an open orientation by a user. The RFID reader 102 is usedto read the RFID tag 110. Information or signaling indicating whetherthe RFID tag 110 is read or not by the RFID reader 102 is passed to thecontrol circuit 104 and in some embodiments, used to determine an openstatus of the container. In some embodiments, the RFID tag reader 102 islocated in the far field of RFID communication relative to the locationof the RFID tag 110. As such, in embodiments where the RFID tag 110comprises decoupleable near field and far field components, the RFID tag110 is readable by the RFID reader when the near field and far fieldcomponents are coupled together. The RFID tag 110 is no longer readableby the RFID reader when the near field and far field components aredecoupled, since the RFID tag would only be readable in the near fieldand the RFID reader is in the far field of RFID communication relativeto the RFID tag.

In some embodiments, the control circuit 104 is integrated with or partof the device or apparatus including the RFID reader 102 (as indicatedby the dashed box 116). In some embodiments, the control circuit 104 andthe RFID reader 102 are integrated on the same integrated circuitdevice, e.g., on the same circuit board. In such cases, it is noted thatwhen the RFID reader 102 and control circuit 104 are integrated, afunction indicated herein as being performed by the control circuit mayalso be performed by the RFID reader 102. In other embodiments, thecontrol circuit 104 is separate from and coupled to the RFID reader 102.For example, the control circuit 104 may be located at, integrated intoor coupled to the central system 106. In such cases, the control circuit104 is coupled by one or more wired and/or wireless communication linksusing the appropriate communicating devices. In some embodiments, thecentral system 106 may be at a physical location or local to thelocation of the control circuit 104 and/or reader 102, or may be at aremote location, for example, the central system 106 is a remote system(in the cloud) and coupled to the control circuit 104 via a network.Further, in some embodiments, the central system 106 may be used tostore and monitor the open status of containers that are initially in aclosed orientation, but are intended to be opened by a user, where suchdetection and determinations of open status are made by the controlcircuit 104. Such information and/or open statuses may be communicatedfor stored, display, communication, etc. to various user devices 108.

FIG. 2 illustrates one embodiment of a control circuit such as generallyshown in FIG. 1. The control circuit 200 includes a processor 202, amemory 204, an input/output (I/O) interface 206 and an optional userinterface 208. Generally, the memory 204 stores the operational code orset of instructions that is executed by the processor 202 to implementthe functionality of the circuit. The memory 204 also stores anyparticular data that may be needed to detect the open status and makethe determinations discussed herein. Such data may be pre-stored in thememory or be received, for example, from the central system 106 duringuse. It is understood that the processor 202 may be implemented as oneor more processor devices as are well known in the art. Similarly, thememory 204 may be implemented as one or more memory devices as are wellknown in the art, such as one or more processor readable and/or computerreadable media and can include volatile and/or nonvolatile media, suchas RAM, ROM, EEPROM, flash memory and/or other memory technology.Further, the memory 204 is shown as internal to the system 200; however,the memory 204 can be internal, external or a combination of internaland external memory. Additionally, the control circuit may include apower supply (not shown) or it may receive power from an externalsource.

The processor 202 and the memory 204 may be integrated together, such asin a microcontroller, application specification integrated circuit,field programmable gate array or other such device, or may be separatedevices coupled together. The I/O interface 206 allows communicationalcoupling of the control circuit to external components, such as thecentral system 106 and/or user devices 108. Accordingly, the I/Ointerface 206 may include any known wired and/or wireless interfacingdevice, circuit and/or connecting device. In some embodiments, a userinterface 208 is included in the control circuit 200 which may be usedfor user input and/or output display. For example, the user interface208 may include any known input devices, such a buttons, knobs,selectors, switches, keys, touch input surfaces and/or displays, etc.Additionally, the user interface 208 may include one or more outputdisplay devices, such as lights, visual indicators, display screens,etc. to convey information to a user, such as a given open status of agiven container. The control circuit 200 is configured to communicatewith the reader 102 to control its operation and to receive informationfrom the RFID reader 102 regarding the reading of certain RFID tags.While FIG. 2 illustrates the RFID reader 102 being coupled to theprocessor 202, it is understood that the reader 102 may actually becoupled to a communication bus of the control circuit 200 to which theprocessor 202 and/or memory 204 may also be coupled. In someembodiments, the control circuit 200 and the RFID reader 102 areintegrated on the same integrated circuit device, e.g., on the samecircuit board.

Generally, the control circuits 104 and 200 can comprise a fixed-purposehard-wired platform or can comprise a partially or wholly programmableplatform. These architectural options are well known and understood inthe art and require no further description here. These control circuits104 and 200 are configured (for example, by using correspondingprogramming as will be well understood by those skilled in the art) tocarry out one or more of the steps, actions, and/or functions describedherein.

Referring next to FIGS. 3A-3D, diagrams are shown illustrating anapplication in accordance with several embodiments in order toautomatically detect an open status of a container normally in a closedorientation and for which will be moved to at least a partially openorientation by user action. A first portion 302 of the container and asecond portion 304 of the container are removably coupled to each other.In the illustrated embodiment, the first portion 302 comprises an insertthat at least partially fits within a space formed by the second portion304, which is embodied as a sleeve. In some embodiments, one or both ofthe first portion 302 and the second portion 304 are integral to or partof the container. In some embodiments, one or both of the first portion302 and the second portion 304 are components that are fixed tocontainer.

In some embodiments, the first portion 302 includes one or more RFID tagdevices. In the illustrated embodiments, a first RFID tag 306 is coupled(e.g., applied, formed, integrated, adhered, etc.) to a surface of thefirst portion 306, where the first RFID tag 306 is configured by itselfto communicate only in a near field of RFID communication. For example,the first RFID tag 306 includes a chip and a near field antenna (e.g.,loop antenna). In some embodiments, the first RFID tag may be referredto as a near field only RFID tag. A conductive element 308 isimplemented (e.g., formed, printed, patterned, etched, adhered, etc.) atthe second portion 304. The conductive element 308 is located inproximity to the first RFID tag 306 when the container is in the closedorientation. The conductive element 308 is configured to function as afar field antenna for the first RFID tag 306 such that the first RFIDtag 306 is readable by an RFID reader in a far field of RFIDcommunication when the container is in the closed orientation(illustrated in FIG. 3A). It is noted that the first RFID tag 306 isalso readable in the near field of RFID communication. FIG. 3Aillustrates the readability of the first RFID tag in the far field asdashed arrow 310. Further details and implementations of near field onlyRFID tag devices coupled together with conductive elements forming farfield antennas as described in the patents and patent applicationsincorporated herein by reference above.

As illustrated, the first RFID tag 306 extends from the space formed bythe second portion, e.g., it is not covered by the second portion 304.In some embodiments, the conductive element 308 is formed at or near aperiphery edge of the second portion 304 such that the conductiveelement 308 inductively, electrically or capacitively couples to thenear field antenna (e.g., loop antenna) of the first RFID tag 306. Insome embodiments, if the conductive element 308 were to cover the firstRFID tag 306, it would electromagnetically shield the first RFID tagsuch that the first RFID tag 306 would not be readable in the far fieldof RFID communication.

A second RFID tag 312 is fixed to the first portion 302 such that thesecond RFID tag 312 is shielded by the second portion 304 and is notreadable by the RFID reader when the container is in the closedorientation. For example, in some embodiments, the second portion 304 ismade of a conductive material that substantially surrounds the secondRFID tag 312 and functions as a Faraday cage making it unreadable in thefar field of RFID communication. In some embodiments, an optional thirdRFID tag 314 is fixed to the first portion 302 such that the third RFIDtag 314 is also shielded by the second portion 304 and is not readableby the RFID reader when the container is in the closed orientation. Forexample, in some embodiments, the second portion 304 substantiallysurrounds the third RFID tag 314 functioning as a Faraday cage andmaking it unreadable in the far field of RFID communication.

Thus, in some embodiments, as illustrated in FIG. 3A, when the containeris in the closed orientation, the first RFID tag 306 is readable by theRFID reader in the far field of RFID communication, whereas the secondRFID tag 312 and the third RFID tag 314 are not readable in the farfield.

FIG. 3B illustrates the relative positioning of the first portion 302and the second portion 304 upon a user action to open the container atleast a first amount. The relative motion is illustrated for example asthe first portion 302 moving in the direction of arrow 316. Suchmovement decouples the first RFID tag 306 (e.g., near field only device)from the conductive element 308 (e.g. far field antenna) such that thefirst RFID tag 306 is no longer readable in the far field. In someembodiments, the cessation of readability of the first RFID tag 306indicates a first open status of the container. Depending on theembodiment, the first open status may correspond to one or both of anunsealed status and an open motion initiation status of the container.In FIG. 3B, the second RFID tag 312 and the third RFID tag 314 are stillshielded by the second portion 304 and; thus, as not readable by theRFID reader in the far field.

FIG. 3C illustrates the relative positioning of the first portion 302and the second portion 304 upon a user action to further open thecontainer at least a second amount. The relative motion is illustratedfor example as the first portion 302 moving in the direction of arrow318. Such movement further results in the exposure or unshielding of thesecond RFID tag 312 which is now readable by an RFID reader in the farfield, as indicated by dashed arrow 320. In this orientation, the firstRFID tag 306 and the third RFID tag 314 are not readable in the farfield, but the second RFID tag 312 is. In some embodiments, the readingof the second RFID tag 312 indicates a second open status of thecontainer. Depending on the embodiment, the second open status maycorrespond to or comprise at least one of an unsealing confirmation, anopen motion initiation status, an open motion confirmation, a partialopen status and a fully open status of the container.

FIG. 3D illustrates the relative positioning of the first portion 302and the second portion 304 upon a user action to further open thecontainer at least a third amount. The relative motion is illustratedfor example as the first portion 302 moving in the direction of arrow321. Such movement further results in the exposure or unshielding of thethird RFID tag 314 which is now readable by an RFID reader in the farfield, as indicated by dashed arrow 322. In this orientation, the firstRFID tag 306 is not readable in the far field, but the second RFID tag312 and the third RFID tag 314 are. In some embodiments, the reading ofthe third RFID tag 314 indicates a third open status of the container.Depending on the embodiment, the third open status may correspond to orcomprise at least one of a partial open status and a fully open statusof the container.

FIGS. 3A-3D illustrate various opening motions triggered by the user. Insome embodiments, each motion is a separate incremental motion. In someembodiments, each motion is a portion or positional snapshot of onecontinuous motion.

In some embodiments, the reading and cessation of reading of one or moreRFID tags provides indications of an open status of the container. Forexample, in one embodiment, when the first RFID tag 306 is read in thefar field by the RFID reader (e.g., see FIG. 3A), the open status of thecontainer corresponds to fully closed and optionally fully sealeddepending on the closure mechanism of the container. When the firstportion and the second portion are moved relative to each other at leasta first amount (e.g., see FIG. 3B), the first RFID tag 306 is no longerreadable in the far field. In some embodiments, this indicates anunsealed status or an open motion initiation status. When the firstportion and the second portion are moved relative to each other at leasta second amount (e.g., see FIG. 3C), the second RFID tag 312 is nowreadable in the far field indicating that the open status is one or moreof an unsealing confirmation, an open motion initiation status, an openmotion confirmation, a partial open status and a fully open status. Insome embodiments, an unsealing confirmation status is an indication thatconfirms that the container has been unsealed, an open motion initiationstatus is an indication that the opening motion has begun, and an openmotion confirmation status is an indication that the opening motion hasbeen initiated or confirmed. In some embodiments, a partial open statusand a fully open status are indications that the container is partiallyopen and fully open, respectively. Whether the indication is partial orfully open is a function of the range of motion of the first portion 302and the second portion 304, the range of motion needed for the containerto be partially or fully open, and/or the location of the second RFIDtag on the first portion.

In embodiments with the third RFID tag 314, when the first portion andthe second portion are moved relative to each other at least a thirdamount (e.g., see FIG. 3D), the third RFID tag 314 is now readable inthe far field indicating that the open status is a fully open status.For example, in such embodiments, typically the reading of the secondRFID tag 312 would indicate one or more of an unsealing confirmation, anopen motion confirmation, and a partial open status, and the reading ofthe third RFID tag 314 would indicate an open status being fully open.

It is understood that while FIGS. 3A-3D illustrate the first portionmoving relative to a stationary second portion, the relative movementmay occur in any way that results in this relative movement. Forexample, the second portion could be moved relative to a fixed firstportion. In another example, both of the first portion and the secondportion could be moved relative to each other in the user's openingmotion.

In order to distinguish between tag reads, each tag can be encoded witha unique identifier known to the control circuit and that is provided bythe reader when being read. In some embodiments, the tags may be encodedwith an Electronic Product Code (EPC) such as a Serialised Global TradeItem Number (SGTIN) of the EPCGlobal Tag Data Standard as is well knownin the art. In some embodiments, the unique identifiers are identical toeach except for at least one bit, e.g., the last 1-2 bits of a SGTIN EPCcode could be different. By using embodiments that allow automaticdetection of the open status of a container, it can be determinedautomatically and without visual inspection if a given container hasbeen opened, or has been unsealed but not fully opened.

While the first RFID tag 306 is illustrated as a decoupled design RFIDtag such as described in the patent and applications incorporated hereinby reference, the second and third RFID tags could be any RFID tagdesign known in the art that is readable in the far field of RFIDcommunication. Further, in some embodiments, the second and third tagscould be implemented as a multi-tag RFID device that includes first andsecond near field RFID tags implemented on a substrate and that are eachcoupled to and share a conductive element on the substrate thatfunctions as a far field antenna to both the first and second near fieldonly RFID tags, such as described with reference to FIGS. 6 and 7.

Referring to the plan views of FIGS. 4A and 4B, an exemplary firstcomponent 402 and second component 404 (i.e., more specific examples ofthe first portion 302 and the second portion 304 of FIGS. 3A-3D) of acontainer is shown. In FIG. 4A, the first component 402 includes a firstRFID tag 406 and a second RFID tag 412 fixed thereto. In thisembodiment, the first component 402 is embodied as an insert that fitswithin a space formed by the second component 404 (seen in FIG. 4B).

The first RFID tag 406 is configured to operate only in the near fieldof RFID communications. Accordingly, the first RFID tag 406 includes anintegrated circuit or chip and near field antenna (e.g., loop antenna).For example, as is illustrated in more detail in FIG. 4C, the first RFIDtag 406 includes an integrated circuit or chip 420 coupled to a nearfield antenna 422 (e.g., loop antenna) and including elongatedconductors 424 and 426 that allow the loop antenna 422 to be coupled toa far field antenna. In some embodiments, the near field RFID tag 406may be implemented as the Impinj® Bolt™ (commercially available fromImpinj, Inc. of Seattle, Wash.) which is a near field only tag that hasa chip with a loop antenna and patterned elongated conductors to allowfor capacitive coupling of the loop to a far field antenna. It is notedthat the loop antenna 422 allows for communication in the near fieldreactive sub-region 1206, and the conductors 424 and 426 allow forcommunication in the near field radiating sub-region 1204. In someembodiments, the near field RFID tag 406 may be implemented as theImpinj® Button™ (commercially available from Impinj, Inc. of Seattle,Wash.) which is a near field only tag that has a chip with a circularloop antenna (and no patterned elongated conductors), which on its ownonly allows for communication in the near field reactive sub-region1206.

The second component 404 includes a portion thereof that implements aconductive element 408 that functions as a far field antenna. When thefirst component 402 is received within the second component 404 (seeFIG. 4B), the conductive element 408 is coupled (e.g., electrically,inductively or capacitively) to the near field antenna 422 of the firstRFID tag 406 (e.g., the conductive element 408 capacitively couples tothe conductor 426 and loop antenna 422) such that the first RFID tag 406is readable in the far field of RFID communications. When the firstcomponent 402 is moved relative to the second component 404 (e.g.,pulled out to the left in the illustration), the first RFID tag 406 isdecoupled from the conductive element 408 such that the first RFID tag406 is no longer readable in the far field.

The second RFID tag 412 can be any RFID tag device that is capable ofbeing read in far field. For example, as shown in FIGS. 4A and 4B, thesecond RFID tag 412 takes the form of a standard inlay having anintegrated circuit or chip 428 and near field antenna 430 (e.g., loopantenna) electrically coupled to and integrated with a far field antennastructure 432. In the illustrated embodiment, the far field antennastructure 432 is a dipole antenna structure and is part of the sameinlay device. When the first component 402 is received within the secondcomponent 404 (see FIG. 4B), the second RFID tag 412 is shielded by thesecond component 404 such that it cannot be read by the RFID reader.When the first component 402 is moved relative to the second component404 to expose the second RFID tag 412, the second RFID tag 412 is nolonger shielded and may be read by the RFID reader in the far field.

Relative to the generic embodiments of FIGS. 3A-3D, the first RFID tag406 is an embodiment of the first RFID tag 306, and the second RFID tag412 is an embodiment of the second RFID tag 312. In the embodiment ofFIGS. 4A-4B, there is no embodiment of a third RFID tag, but it isunderstood that a third RFID tag could be added.

In some embodiments, the first component is an insert configured to fitwithin the second component which may be embodied as a sleeve. In someembodiments, the insert is at least partially flexible such that it canbe removed from the sleeve but not easily re-inserted back into thesleeve. In some embodiments, a tool is provided to insert the firstcomponent within the sleeve. For example, an insert tool 502 is shown inFIG. 5. In some embodiments, the tool 502 comprises a handle 508 and twoelongated pieces 504 and 506 (e.g., blades or plates) that sandwich thefirst component 402. The tool 502 is generally more rigid that the firstcomponent 402. In some embodiments, the tool is inserted through thesecond component 404 from a through side, while the first component 402is sandwiched between the pieces 504 and 506 extending from the secondcomponent. Then the tool 502 is pulled by the handle 508 to guide thefirst component 402 into the second component 404. Once the firstcomponent 402 is fully inserted, the tool 502 is pulled free of thesecond component 404.

Referring next to FIG. 6, a side elevation view is shown of a multi-tagRFID device 600 including a first near field RFID tag device 602 and asecond near field RFID tag device 604 implemented on a substrate 606 andthat are each coupled to and share a conductive element 608 on thesubstrate that functions as a far field antenna to both the first andsecond near field RFID tag devices 602 and 604. In the illustratedembodiments, the first near field RFID tag device 602 is fixed at afirst portion (e.g., first end) of the substrate and the second nearfield RFID tag device 604 is fixed at a second portion (e.g., secondend) of the substrate. In some embodiments, the first and second nearfield RFID tag devices are fixed to the substrate being spaced apartfrom each other.

Generally, each of the near field RFID tag devices includes anintegrated circuit device or chip and a near field antenna (e.g., a loopantenna), and optionally any coupling structure that may be needed ordesired to couple the near field antenna to the conductive element. Theconductive element 608 may be any far field antenna structure or patternas is known in the arts. The conductive element 608 can be configured tocouple to the antenna of each of the near field RFID tag devices throughone of electrical, inductive and capacitive coupling. Such variouscoupling approaches are further described in the patents and patentapplications incorporated herein by reference. In some embodiments, thenear field RFID tag devices and the conductive element are manufacturedtogether and implemented on a single inlay device.

Functionally, the first near field RFID tag device 602 couples with theconductive element 608 to form a first combination near field and farfield RFID tag 610 that can be read in the near field as well as in thefar field. Arrow 614 indicates the readability of the RFID tag 610 inthe far field of RFID communication. The second near field RFID tagdevice 604 couples with the conductive element 608 to form a secondcombination near field and far field RFID tag 612 that can be read inthe near field as well as in the far field. Arrow 616 indicates thereadability of the RFID tag 512 in the far field of RFID communication.

It is understood that while two near field RFID tag devices areillustrated, three or more near field RFID tag devices could beimplemented on the substrate and spaced apart from the other near fieldRFID tag devices and also share the conductive element.

In some embodiments, the multi-tag RFID device may be useful inapplications where one or more of the near field RFID tag devices can beselectively shielded, e.g., by a conductive barrier positioned about theone or more near field RFID tag devices. Such can result in theselective readability of one or more of the near field RFID tag devicesto an RFID reader, which can be used to make automated determinationsand/or detections.

In some embodiments, a multi-tag RFID device may be implemented on thefirst portion (e.g., first component) of a container and useful toindicate one or more open statuses of the container. Referring to FIG.7, an embodiment of the first component of FIGS. 4A and 4B is shownwhere a multi-tag RFID device 730 is used to implement second and thirdRFID tags (e.g., second and third RFID tags 312 and 314). For example,the first component 702 includes the first RFID tag 406 and a multi-tagRFID device 730 including a first near field RFID tag device 732 and asecond near field RFID tag device 734 that are each coupled to and sharea conductive element 738 that functions as a far field antenna to boththe first and second near field RFID tag devices 732 and 734. The firstnear field RFID tag device 732 and the conductive element 738 coupletogether and function as a second RFID tag (e.g., second RFID tag 312 or412). The second near field RFID tag device 734 and the conductiveelement 738 couple together and function as a third RFID tag (e.g.,third RFID tag 314). In some embodiments, each of the first and secondnear field RFID tag devices 732 and 734 include an integrated circuit orchip (e.g., chip 428, 420) and a near field antenna (e.g., loop antenna422, 430).

When the first component 702 is fully inserted into the second component404, the first RFID tag 406 couples to the conductive element 408 suchthat the first RFID tag 406 is readable in the far field. When the firstcomponent 402 is moved relative to the second component 404 a firstamount (such as in FIG. 3B), the first RFID tag 406 is no longerreadable in the far field, and both the first near field RFID tag device732 and the second near field RFID tag device 734 are likewise notreadable in the far field since they are shielded by the secondcomponent 404. When the first component 402 is moved relative to thesecond component 404 a second amount (such as in FIG. 3C), the firstnear field RFID tag device 732 is exposed making it readable in the farfield whereas the second near field RFID tag device 734 is not readablein the far field since it is still shielded by the second component 404.When the first component 402 is moved relative to the second component404 a third amount (such as in FIG. 3C), both the first near field RFIDtag device 732 and the second near field RFID tag device 734 areexposed, making them both readable in the far field.

Reference is now made to the flow diagram of FIG. 8 which illustrates aprocess occurring at a control circuit (e.g., control circuits 104and/or 200) coupled to at least one RFID reader in accordance withseveral embodiments. The process of FIG. 8 may be performed by one ormore of the systems and applications described herein.

Generally, the control circuit uses (or is configured to use) at leastinformation received via the RFID reader regarding a reading of one ormore RFID tags by the RFID reader, to determine one or more openstatuses of a container normally in a closed orientation and which canat least be partially opened.

In Step 802, the control circuit receives a first indication from theRFID reader that a first RFID tag was read in a far field of RFIDcommunication by the RFID reader. In some embodiments, the first RFIDtag is fixed to a first portion of the container and configured byitself to communicate only in a near field of RFID operation. The firstRFID tag is located in proximity to a conductive element implemented ata second portion of the container when the container is in the closedorientation, such that the conductive element is configured to functionas a far field antenna for the first RFID tag when the container is inthe closed orientation. In this arrangement and configuration, the firstRFID tag is readable and is read in the far field of RFID communication(e.g. see the first RFID tag 306 in FIG. 3A). In some embodiments, thereading of the first RFID tag indicates the open status of the containeras being fully closed or fully sealed.

Upon a user action to open the container at least a first amount (e.g.,see FIG. 3B), the first portion and the second portion of the containermove relative to each other decoupling the conductive element from thefirst RFID tag such that the first RFID tag is no longer readable in thefar field. In this case, the first RFID tag can no longer be read in thefar field and attempts to read the first RFID tag will result in afailure. In step 804, the control circuit determines, using informationreceived via the RFID reader, a first open status of the container asindicated by a failed attempt to further read the first RFID tag in thefar field of RFID communication by the RFID reader. In some embodiments,the first open status comprises at least one of an unsealed status andan opening motion initiation status.

The container also includes a second RFID tag that is fixed to the firstportion of the container such that the second RFID tag is shielded bythe second portion and is not readable by the RFID reader when thecontainer is in the closed orientation. Next, upon a user action to openthe container at least a second amount (e.g., see FIG. 3C), the firstportion and the second portion move relative to each other such that thesecond RFID tag is no longer shielded and is now readable in the farfield by the RFID reader. In this case, the second RFID tag will respondto interrogation signaling from the RFID reader, e.g., providing itsidentification. The RFID reader will now be able to read the second RFIDtag in the far field. In step 806, the control circuit receives a secondindication from the RFID reader that a second RFID tag was read in thefar field of RFID communication by the RFID reader. In step 808, thecontrol circuit determines, from the second indication, a second openstatus of the container. Depending on the embodiment, the second openstatus comprises one or more of an unsealing confirmation, an openmotion initiation status, an open motion confirmation, a partial openstatus and a fully open status.

The container also includes a third RFID tag that is fixed to the firstportion such that the third RFID tag is shielded by the second portionand is not readable by the RFID reader when the container is in theclosed orientation. Upon a user action to open the container at least athird amount (e.g., see FIG. 3D), the first portion and the secondportion move relative to each other such that the third RFID tag is nolonger shielded and is now readable by the RFID reader. In this case,the third RFID tag will respond to interrogation signaling from the RFIDreader, e.g., providing its identification. The RFID reader will now beable to read the third RFID tag in the far field. In step 810, thecontrol circuit receives a third indication from the RFID reader that athird RFID tag was read in the far field of RFID communication by theRFID reader. In step 812, the control circuit determines, from the thirdindication, a third open status of the container. In some embodiments,the third open status comprises a fully open status.

Referring next to FIGS. 9A-9C, illustrations are shown of a genericcontainer 900 normally in a closed orientation (see FIG. 9A) and whichwill be at least partially opened through user actions (see FIGS. 9B and9C). In these embodiments, the container 900 includes a first portion902 and a second portion 904 that are removably coupled to each other.For example, in the illustrated embodiment, the first portion 902 is afirst component (e.g., the first component 302, 402 or 702) coupled to alid of the container and the second portion 904 is a second component(e.g., the second component 302 or 402) coupled to a body of thecontainer. In FIG. 9A, a first RFID tag (e.g., first RFID tag 306) isreadable in the far field since it is coupled a conductive element(e.g., element 308) of the second portion, but the second and optionalthird RFID tags (e.g., RFID tags 312 and 314) are shielded by the secondportion and are not readable in the far field. In some embodiments,given that only the first RFID tag is readable in the far field, thisindicates that the open status of the container is fully closed and/orfully sealed.

In FIG. 9B, the first and second portions 902 and 904 have been moved anamount relative to each other, which decouples the first RFID tag fromthe conductive element such that the first RFID tag is not readable inthe far field. Depending on how far the first and second portions 902and 904 are moved relative to each other, the second RFID tag (e.g.,RFID tag 312) may or may not be readable in the far field. That is, theamount of movement will indicate whether the example diagram of FIG. 3Bor 3C is applicable. In FIG. 9B, the optional third RFID tag is shieldedby the second portion 904. In some embodiments, if the first RFID tag isno longer readable in the far field, this indicates an open status ofone or more of an unsealed status and an opening motion initiationstatus. In some embodiments, if the second RFID tag is also readable,this can indicate an open status of one or more of an unsealingconfirmation, an open motion confirmation, a partial open status and afully open status. In the illustrated embodiment, the open status is allof an unsealing confirmation, an open motion confirmation, and a partialopen status.

In FIG. 9C, the first and second portions 902 and 904 have been moved afurther amount relative to each other such that one or both of thesecond and third RFID tags are now readable in the far field, e.g., suchas in the illustration of FIG. 3D. In some embodiments, if the secondRFID tag and optional third RFID tag are also readable, this indicatesan open status of one or more of an unsealing confirmation, an openmotion confirmation, a partial open status and a fully open status. Inthe illustrated form, the open status is fully open.

While the container illustrated in FIGS. 9A-9C takes the form of abox-like container, it is understood that the containers describedherein may be implemented any type of known container or any shape,size, material weight, enclosure mechanism known the art. In thisregard, FIGS. 10A-10C illustrate another container 1000 taking the formof a zippered bag or pouch. FIG. 10A and the enlargement of FIG. 10Billustrate the container 1000 in the closed orientation where a firstportion 1002 is inserted within a second portion 1004 coupled to anexterior portion of the container 1000. The first portion 1002 iscoupled by a connector 1008 (string or wire) to a zipper pull 1006 of azipper 1010. As illustrated in FIG. 10C, when the user pulls the zipperpull 1006 to open the container 1000, the first portion 1002 is removedat least some amount from the second portion 1004. In FIG. 10C, thefirst portion 1002 is fully removed from the second portion 1004. Thedegree of removal of the first portion 1002 from the second portion 1004and the cessation of reading and the readability of certain RFID tagswill indicate various open statuses of the container, which areautomatically determined by a control circuit coupled to an RFID reader.The first and second portions 1002 and 1004 can be in accordance withany such portions or components described and taught herein.

In a variation of FIGS. 10A-10C, as shown in FIG. 11, a protective flap1102 is positioned over the first portion 1002 and the second portion1004 and is connected to the zipper 1010. The under surface of theprotective flap 1102 includes a top Velcro surface (one of hook and loopstructured surfaces) mated to bottom Velcro surfaces 1104 and 1106 (theother of hook and loop structured surfaces) in order to hold the flap1102 in position over the first and second portions. To open thecontainer, the flap 1102 is peeled back and pulled. In this embodiment,the flap is coupled to the first portion 1002 and to the zipper 1010 atthe pull location 1108; thus, the flap becomes the zipper pull. When theflap 1102 is pulled back (even before the zipper is opened), the firstportion 1002 is at least partially removed from the second portion 1004.

To further illustrate the coupling and decoupling of near field and farfield components of an RFID device in accordance with some embodiment,reference is made to FIGS. 13A-13B. In FIG. 13A, a near field RFID tag1302 is illustrated including an integrated circuit or chip 1320 coupledto a near field antenna 1322 (e.g., loop antenna) and includingelongated conductors 1324 and 1326 that allow the near field antenna1322 to be coupled to a conductive element 1308 that functions as a farfield antenna. In FIG. 13A, the conductor 1326 is capacitively coupledto the conductive element 1308.

In operation, each of the conductors 1324 and 1326 can function as afirst electrode of a capacitor formed between itself and a far field ortag antenna, where a portion of the far field antenna forms the secondelectrode of the capacitor. Electromagnetic energy from the tag readercauses the voltage on the far field antenna (particularly at its end) tooscillate building a charge. This creates an oscillating potentialdifference at each elongated side of the near field RFID tag 1302, whichcauses a current to flow about the loop 1322. This flowing currentallows the chip 1320 to operate and in turn, the conductive element 1308functioning as the far field antenna capacitively coupled to the RFIDtag 1302 to transmit an encoded backscattered signal to the tag reader.

In one embodiment, the near field RFID tag 1302 may be pre-manufactured.According to several embodiments, the near field RFID tag 1302 does notfunction as a far field RFID tag, i.e., on its own, it cannot be read inthe far field by a reader. In preferred embodiments, the near fieldantenna 1322 is designed, shaped and/or configured to be suitable foruse with a far field antenna capacitively coupled thereto. In somecases, the width or thickness of the conductors 1324 and 1326 isdesigned to ensure good capacitive coupling with the far field antenna.

The conductors 1324 and 1326 may extend from the near field antenna 1322in a variety of ways and have varying lengths depending on the far fieldantenna it is intended to couple with. However, the coupling conductors1324 and 1326 do not themselves function as far field antennas.Accordingly, while there is some additional conductive material apartfrom the near field antenna 1322, the near field RFID tag 1302 apartfrom a far field antenna is a near field only RFID tag that functions inthe near field. For example, the conductors 1324 and 1326 cause the nearfield RFID tag 1302 to operate in the near field radiating sub-region1204, whereas the near field antenna 1322 (e.g., loop) causes the nearfield RFID tag 1302 to operate in the near field reactive sub-region1206.

When coupled with a far field antenna such as conductive element 1308,the resulting combination functions in both the near field and the farfield. In some embodiments, to affect capacitive coupling, the nearfield RFID tag 1302 is coupled in a spaced relationship to one end 1304of the conductive element 1308 (e.g., at a distal region 1310 of theconductive element as opposed to at or near the central region 1312). Inoperation, the voltage at the end 1304 (distal region 1310) oscillatesdue to the received electromagnetic energy from the reader. In someembodiments, the end 1304 and the conductor 1326 form two electrodes ofa capacitor. As the voltage oscillates at the end 1304 building acharge, this creates an oscillating potential difference at the side ofthe tag 1302, which causes a current to flow about the near fieldantenna 1322. This flowing current allows the chip 1320 to operate andin turn, the conductive element 1308 capacitively coupled to the tag1302 to transmit an encoded backscattered signal to the tag reader. Whenthe end 1304 or distal region 1310 of the conductive element 1308 iscapacitively coupled to the near field RFID tag 1302, the device becomesvisible in the far field to an RFID reader.

As illustrated in FIG. 13B, when the near field RFID tag 1302 and theconductive element 1308 are moved relative to each other, the twocomponents are decoupled, i.e., no longer capacitively coupled. Thus,the near field RFID tag 1302 is now only readable in the near field, notin the far field.

The near field RFID tag 1302 could be an embodiment of the first RFIDtag 302 or 406, for example, and the conductive element may be anembodiment of conductive elements 308 and 408, for example. It isunderstood that while FIGS. 13A-13B illustrate the capacitive couplingof the near field RFID tag 1302 and the conductive element 1308, inother embodiments, the two components may be inductively or electricallycoupled together such as described in the various patent documentsincorporated herein by reference.

In some embodiments, an application of one or more embodiments of themethods and structures to determine an open status of a container may beused in a secure delivery application in order to determine and/orverify opening of a package intended for delivery to a recipient(person). For example, the container may be delivered and locked withina delivered-package vault such as described in U.S. patent applicationSer. No. 14/052,102 filed Oct. 11, 2013 and entitled SECURE DELIVERYRECEPTACLE, which is incorporated herein by reference. In someembodiments, the container contains the package for delivery to anintended recipient. The container is stored in the delivered packagevault and locked therein, such that the intended recipient is notrequired to be physically present to accept delivery of the package.Such package vault may contain one or more structures and methods todetermine that the container with package has been placed within thevault. In some embodiments, the container is pre-located in the vault(or part of the vault) and the package is delivered to the vault andinserted into the container within the vault by the delivery person. Insome embodiments, the vault includes an RFID reader configured to readtags in the far field of RFID operation. When an intended recipientaccesses the package vault to retrieve the package from the container(e.g., at the recipients convenience), one or more methods and/orapparatuses described herein may be used to determine the open status ofthe container. For example, the container includes a first RFID tag andthe second RFID tag (and optional third or additional RFID tag/s) asvariously described herein. If the first RFID tag is read by the vault'sreader, the control circuit (coupled to the reader) can determine thatthe container is sealed/closed. However, once the first tag is no longerread by the reader, the control circuit can determine that the containeris unsealed or that the container opening has been initiated orconfirmed, for example. In some forms, the vault can distinguish ascenario where the first tag is not being read anymore because thecontainer was moved from the vault out of range of the reader withoutopening the container (e.g., the container is fixed into the vault,opening size restriction, or there is another way (e.g., visual) toverify that the container is present in the vault). Once the second andoptional third or more RFID tags are read by the reader (as they areexposed as described herein), the control circuit can determine one ormore additional open status. Once the recipient has opened thecontainer, the package may be retrieved therefrom, completing delivery.In some embodiments, measures can be taken to ensure that the rightcontainer has been opened by the right recipient. For example, by readerthe various tags and using their identifiers, the control circuit candetermine if the proper user (e.g., as determined at the point of accessto the vault) has opened the proper container. If not, warning messages,emails, text messages or other electronic warnings may be issued to theappropriate system or person/s. In some embodiments, the container maybe a refrigerated container or otherwise a container that requiressealing due to the package contained therein. Thus, in some embodiments,the reading or cessation of reading of the RFID tags can be used todetermine an unsealed status. In the case of perishable packages (e.g.,groceries, food items, refrigerated items, etc.), the control circuit(or other circuit or system in communication therewith) could start atimer and track whether the container has been fully opened within aspecified time. For example, one could accidentally unseal a containerbut not open it fully, which would be detectable. In another example,someone may gain access to the vault and tamper with one or morecontainers, which could be detected in the opening/unsealing of thecontainer. In some embodiments, since the first portion is flexibleinsert within a sleeve (second portion) and may even require aninsertion tool, it would be difficult for one who tampered oraccidentally unsealed a package to re-insert the first portion into thesecond portion. Corrective action could be taken or signaled to betaken, e.g., a warning message, refund of purchase, re-delivery of theitem, etc. There are many alternatives and variations of these exampleapplications that may use one or more embodiments of the methods andapparatuses described herein. It is understood that many otherapplications may use one or more embodiments of the methods andapparatuses described herein.

Those skilled in the art will recognize that a wide variety of othermodifications, alterations, and combinations can also be made withrespect to the above described embodiments without departing from thescope of the invention, and that such modifications, alterations, andcombinations are to be viewed as being within the ambit of the inventiveconcept.

What is claimed is:
 1. A radio frequency identification (RFID) devicecomprising: a first portion of an item; a second portion of the itemcoupled to the first portion, wherein the second portion comprises aconductive material; an RFID tag device comprising: a substrate; a firstRFID tag fixed at a first portion of the substrate; and a second RFIDtag fixed at a second portion of the substrate; wherein the secondportion of the substrate is positioned against the second portion of theitem such that the second RFID tag is shielded by the conductivematerial and is not readable by an RFID reader, and wherein the firstportion of the substrate is not positioned against the second portion ofthe item such that the first RFID tag is readable by the RFID tagreader; wherein, upon a user action that causes a separation of thesecond portion of the substrate from the second portion of the item, thesecond RFID tag is no longer shielded by the conductive material and isreadable by the RFID reader indicating a status of the item.
 2. Thedevice of claim 1 wherein the status comprises at least one of anunsealed status, an indication that the RFID tag device is separatedfrom the second portion of the item, and an opening motion initiationstatus.
 3. The device of claim 1 wherein the status comprises at leastone of an unsealing confirmation, an open motion confirmation, a partialopen status, an indication that the RFID tag device is separated fromthe second portion of the item, and a fully open status.
 4. The deviceof claim 1 wherein the second RFID tag comprises a near field RFID tagand a far field antenna fixed to a substrate, wherein the far fieldantenna is configured to allow the near field RFID tag to be readable inthe far field of RFID communication by the RFID reader, wherein upon theuser action that causes the separation of the second portion of thesubstrate from the second portion of the item, the second RFID tag is nolonger shielded by the conductive material and is readable by the RFIDreader indicating the status of the item.
 5. The device of claim 1further comprising a third RFID tag fixed to a third portion of thesubstrate, wherein the third portion of the substrate is positionedagainst the second portion of the item such that the third RFID tag isshielded by the conductive material and is not readable by the RFIDreader; wherein upon a user action that causes a separation of the thirdportion of the substrate from the second portion of the item, the thirdRFID tag is no longer shielded by the conductive material and isreadable by the RFID reader indicating another status of the item. 6.The device of claim 1 wherein the conductive portion of the secondportion of the item comprises a component fixed to the item.
 7. Thedevice of claim 6 wherein the component comprises a strip conductivematerial having length and width dimensions substantially correspondingto length and width dimensions of the second portion of the substrate ofthe RFID tag device.
 8. The device of claim 1 wherein the conductivematerial is configured to function as a Faraday cage to shield thesecond RFID tag when the second portion of the substrate is positionedagainst the second portion of the item.
 9. The device of claim 1 whereinthe status comprises an indication that the RFID tag device is separatedfrom the second portion of the item.
 10. The device of claim 1 whereinthe item comprises a container.
 11. The device of claim 1, wherein thefirst RFID tag comprises a first near field RFID tag device; wherein thesecond RFID tag comprises a second near field RFID tag device; whereinthe substrate further comprises a conductive element fixed to thesubstrate and having a first portion proximate and coupled to the firstnear field RFID tag device and having a second portion proximate andcoupled to the second near field RFID tag device, wherein the conductiveelement is configured to function as a far field antenna and is sharedby the first near field RFID tag device and the second near field RFIDtag device and configured to allow the first near field RFID tag deviceto be readable in a far field of RFID communication by the RFID reader,and configured to allow the second near field RFID tag device to bereadable in the far field of RFID communication by the RFID reader uponthe user action that causes the separation of the second portion of thesubstrate from the second portion of the item, the second near fieldRFID tag device being no longer shielded.
 12. The device of claim 11wherein the first near field RFID tag device and the second near fieldRFID tag device are coupled to the conductive element through one ofelectrical, inductive and capacitive coupling.
 13. The device of claim12 wherein the substrate, the first near field RFID tag device, thesecond near field RFID tag device and the conductive element areintegrated as at least a portion of a single inlay.
 14. The device ofclaim 12 wherein the first near field RFID tag device and the secondnear field RFID tag device each comprise a near field only RFID tagcomprising an RFID chip and a near field antenna.
 15. A methodcomprising: by a control circuit that is operably coupled to a radiofrequency identification (RFID) reader: receiving a first indicationfrom the RFID reader that a first RFID tag was read by the RFID reader,wherein the first RFID tag is part of an RFID tag device comprising asubstrate, the first RFID tag and a second RFID tag, wherein the firstRFID tag is fixed at a first portion of the substrate, wherein thesecond RFID tag is fixed at a second portion of the substrate, whereinthe second portion of the substrate is positioned against a secondportion of an item, wherein the item has a first portion and the secondportion, wherein the second portion of the item is coupled to the firstportion of the item, wherein the second portion comprises a conductivematerial, wherein the second RFID tag is shielded by the conductivematerial and is not readable by the RFID reader, and wherein the firstportion of the substrate is not positioned against the second portion ofthe item such that the first RFID tag is readable by the RFID tag readerallowing the first indication to be received by the RFID reader;receiving, upon a user action that causes a separation of the secondportion of the substrate from the second portion of the item such thatthe second RFID tag is no longer shielded by the conductive material, asecond indication from the RFID reader that the second RFID tag was readby the RFID reader; determining, from the second indication, a status ofthe item.
 16. The method of claim 15 wherein the status comprises atleast one of an unsealed status, an indication that the RFID tag deviceis separated from the second portion of the item, and an opening motioninitiation status.
 17. The method of claim 15 wherein the statuscomprises at least one of an unsealing confirmation, an open motionconfirmation, a partial open status, an indication that the RFID tagdevice is separated from the second portion of the item, and a fullyopen status.
 18. The method of claim 15 wherein the second RFID tagcomprises a near field RFID tag and a far field antenna fixed to thesubstrate, wherein the far field antenna is configured to allow the nearfield RFID tag to be readable in the far field of RFID communication bythe RFID reader, wherein the receiving the second indication stepcomprises receiving, upon the user action that causes the separation ofthe second portion of the substrate from the second portion of the itemsuch that the second RFID tag is no longer shielded by the conductivematerial, the second indication from the RFID reader that the secondRFID tag was read by the RFID reader.
 19. The method of claim 15,wherein a third RFID tag is fixed to a third portion of the substrate,wherein the third portion of the substrate is positioned against thesecond portion of the item such that the third RFID tag is shielded bythe conductive material and is not readable by the RFID reader, themethod further comprising: by the control circuit: receiving, upon auser action that causes a separation of the third portion of thesubstrate from the second portion of the item such that the third RFIDtag is no longer shielded by the conductive material, a third indicationfrom the RFID reader that the third RFID tag was read by the RFIDreader, determining, from the third indication, another status of theitem.
 20. The method of claim 15 wherein the conductive portion of thesecond portion of the item comprises a component fixed to the item. 21.The method of claim 20 wherein the component comprises a stripconductive material having length and width dimensions substantiallycorresponding to length and width dimensions of the second portion ofthe substrate of the RFID tag device.
 22. The method of claim 15 whereinthe conductive material is configured to function as a Faraday cage toshield the second RFID tag when the second portion of the substrate ispositioned against the second portion of the item.
 23. The method ofclaim 15 wherein the status comprises an indication that the RFID tagdevice is separated from the second portion of the item.
 24. The methodof claim 15 wherein the item comprises a container.
 25. The method ofclaim 15, wherein the first RFID tag comprises a first near field RFIDtag device; wherein the second RFID tag comprises a second near fieldRFID tag device; wherein the substrate further comprises a conductiveelement fixed to the substrate and having a first portion proximate andcoupled to the first near field RFID tag device and having a secondportion proximate and coupled to the second near field RFID tag device,wherein the conductive element is configured to function as a far fieldantenna and is shared by the first near field RFID tag device and thesecond near field RFID tag device and configured to allow the first nearfield RFID tag device to be readable in a far field of RFIDcommunication by the RFID reader, and configured to allow the secondnear field RFID tag device to be readable in the far field of RFIDcommunication by the RFID reader upon the user action that causes theseparation of the second portion of the substrate from the secondportion of the item, the second near field RFID tag device being nolonger shielded.
 26. The method of claim 25 wherein the first near fieldRFID tag device and the second near field RFID tag device are coupled tothe conductive element through one of electrical, inductive andcapacitive coupling.
 27. The method of claim 26 wherein the substrate,the first near field RFID tag device, the second near field RFID tagdevice and the conductive element are integrated as at least a portionof a single inlay.
 28. The method of claim 26 wherein the first nearfield RFID tag device and the second near field RFID tag device eachcomprise a near field only RFID tag comprising an RFID chip and a nearfield antenna.